Word: aceto
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Dates: during 1960-1969
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Woodward's starting point was aceto-acetic ester, a very ordinary chemical, which was then broken into four different compounds called pyrroles. Then followed what Woodward calls "tailoring the framework"-meaning that he and his 17 helpers devised subtle chemical tricks to put together the skeleton of the chlorophyll molecule and add the atom groups that clothe it. The final step, and one of the most difficult, was to separate chlorophyll-a (the real McCoy) from its mirror image, which was also produced by the synthesis...
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